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notsponge [240]
3 years ago
14

Solve: A = 4pir2 for r.

Mathematics
1 answer:
Airida [17]3 years ago
5 0
 <span>r means radius so it can't be negative. 

<=> 

A = 4 pi r² 

r = sqr (A / 4pi) 
</span>
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